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Article | REF: BN3270 V2

Constructing PWR plants - Primary equipment

Authors: Daniel DESTRE, Jean-Pierre IZARD

Publication date: January 10, 2012, Review date: September 21, 2015

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9. Overpressure protection system

The overpressure protection system for the 900, 1,300 and 1,450 MWe power plants operated by EDF in France (figure 18 ), takes account of the lessons learned from the Three Mile Island 2 accident (see [BN 3 451] ). It comprises three relief lines, each equipped with two safety valves mounted in tandem, controlled by the pressure of condensed steam from the pressurizer.

The first valve in each line, kept...

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